I think the biggest issue they are going through is that this is going to be extremely hard on the husband. They've been together over 50 years and he's not taking any of this well at all. Sooo, the family decided that he really shouldn't spend an awful lot of time by himself and they set up a schedule for everyone to go spend time with him. The one sister never shows up when she's supposed to because she's so "busy". She's also not happy with the suggested funeral arrangements that everyone else in the family has agreed to because her friends would like to attend and what they've all settled on isn't very convenient for them.
She's making a hard enough situation downright unbearable.
I've already got it worked out when either of my parents go, my sister will be in charge of EVERYTHING, I'm just gonna sit back and take orders. She likes being the mother hen.